fell on a man in great falls, virginia, killing him and crushing his car. though that incident happened after plans were in place to remove these trees, the hsa says they want to prevent anything like that from happening again. >> the stories are really, really, really sad. if you want to prevent those, i understand. but i hope they've done a thorough investigation of it. >> reporter: some neighbors, though, say they're surprised these trees are being taken down. >> it's always a contentious issue whenever trees are taken down. i'm actually more concerned about trees that are in neighborhoods where we live. eventually more trees along the green mile could come down for a sidewalk along this side of the roadway. right now, those plans are in the design phase. now, once work starts, one northbound lane between wisconsin and cumberland will be closed, today, tomorrow, and friday, up until 3:00 p.m. they're going to start work at 9:00 a.m. of course, weather could obviously impact this process. live in chevy chase, maryland, melissa mollet, news 4. back to you, aaron. >> thank you, melissa.